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US 5,973,449 AGranted
Display device with specific electrode structure and composition
AssigneesCasio Computer Co., Ltd., Stanley Electric Co., Ltd.
InventorsOsamu Nakamura, Shigemi Suzuki
Life of this patent
Estimating the term…
Abstract
A cold-cathode discharge display device which includes a fluorescent tube and electrodes containing R.sub.2 O.sub.3-z, where R is an atom or an atom group of rare earth elements, O is oxygen, and z is 0.0 to 1.0, to perform field emission of electrons and emission of secondary electrons. The electrodes are generated with an electron emitting film containing rare earth elements.
Claims20
A display device, comprising:
- a cold-cathode discharge lamp for emitting light, having:
- (A) a fluorescent tube including a tube having an inner surface and a fluorescent layer coated on the inner surface of the tube, for emitting light falling within a wavelength range, said tube allowing passage of light emitted from said fluorescent layer;
- (B) a pair of electron-emitting electrodes provided in said fluorescent tube, opposing each other, each comprising a base plate made of electrically conductive material or semiconductor material and an electron-emitting film provided on said base plate and containing rare earth oxide;
- and
- (C) a rare gas and mercury vapor with which said fluorescent tube is filled;
- and
- a liquid crystal display element having a pair of substrates and liquid crystal between said pair of substrates.
4 more elements
A display device, comprising:
- a first substrate;
- a second substrate spaced apart from said first substrate;
- a first electrode provided on a surface of said first substrate which opposes the second substrate, and having an electron-emitting film containing rare earth oxide;
- a second electrode provided on a surface of said second substrate which opposes said first substrate, for generating a plasma when a predetermined voltage is applied between said first and second electrodes;
- and
- a rare gas filled in a space defined by said first and second substrates.
3 more elements
A display device, comprising:
- a first substrate;
- a second substrate spaced apart from said first substrate;
- and
- a plurality of cells arranged between said first and second substrates, said plurality of cells isolated from one another, each cell having a first electrode containing rare earth oxide and a second electrode, for generating a plasma when a predetermined voltage is applied between said first and second electrodes, and a rare gas.
1 more element
Dependencies are inferred from the claim text.